Yeah, but—$$$$ !
Well, you have to look into it to get the answers.
For example, you can get a burner smartphone plan for $40 or $50 a month that will give you at least 3 GB of data. That’ enough for any normal browsing, but not TV downloading.
A lot depends on how data-hungry the people will be. Movies? Or just web browsing? And there’s another factor... it’s got to be easy to use, with little or no learning curve.
Living off the grid ain’t FREE!